Dipper bucket



A ril 27", 1926.

1,582,577 E. E. CRANE DIPPER BUCKET Filed August 24 1925 3 Sheets-Sheet 1 o o 0 Q 0 0 O 5;. 9 00000 April 27 1926.

E. E. CRANE DIPPER BUCKET Filed August 24 1925 3 Sheets-Sheet 2 o Q o o o o o o o o o o fiaezz jrrzasz z aze,

(5 o o o o o o -o April 27 1926.

E. E. CRANE.

DIPPER BUCKET 3 Sheets-Sheet 5 Filed August 24 1925 Patented Apr. 27, 1926.

UNTTED STATES intact? ERNEST E. CRANE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO IEE'JJTIBONE, MULLI- mm OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

:orrrnr. sucker.

Application filed August 24, 1925. Serial No. 51,993.

To all whom it may concern:

Be it known that I, ERNEST E. CRANE, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and useful Improvement in Dipper Buckets, of which the following is a specification.

This invention relates to dipper buckets for use on steam shovels, dredges and the like-and is fully described in the following specification and shown in the accompanying drawings, in which:

Figure 1 is a front elevation of the dipper bucket showing the front partially in section; 4

Fig. 2 is a partial front elevation of the same; v 1 Figs. 3, 4 and 5 are side elevations of the disassembled back casting, side plate and front respectively;

Fig. 6 is a top plan view of the bucket partiall in'section on the line 6 of Fig. 1; Fig. is a partial section on the line 7 of Flg. 1;

.Fig. 8 is a detail of a modification of the upper back corner of the dipper; and

Fig. 9 is a partial section on the line 9 of Fig. 8. The embodiment illustrated comprises a bucket made up essentially of a back casting 10, a front casting 11 and a side plate 12, connecting the two, the whole being secured together by means of rivets passing 5 through the registering holes therein as shown in Fig. 1. x

This arrangement permits of a very strong but relatively light bucket since the metal of the front and back castings is distributed where it can best resist the strains imposed upon the bucket. Thus the two castings are secured togetherby means of rivets 14 and 15 which take substantially all of the strain of the bucket, the side plates 12 serving principally to retain the loose material therein.

The bail bracket 16 which serves to support the bucket and which is necessarily under severe strains particularly during the operation of digging is rigidly secured directlyto the front casting 11 by means of rivets 17 passing through registering holes in the bracket 16, the front casting 11 and the side plate 12. The central rib 18 and the side ribs 19 are made high enough to protect the heads of the rivets 17 from undue wear from the material through which the dipper bucket is being forced.

The corners are preferably mounted as shown in Figs. 6 and 7 the edge 20 of the plates 12 being curved to fit into the re-. cesses in the back casting 10.

In Figs. 8 and 9 is shown a modified form of the device in which a top band 21 is made separate from the back casting 10 and secured to'this casting and to the side plates 12 by means of rivets 22. A similar band may also be used on the bottom, the construction otherwise being the same as that previously shown and described.

While I' have shown and described but a single embodiment of this invention, it is to be understood that it is capable of many modifications. Changes therefore in the construction and arrangement may be made which do not depart from the spirit and scope of the invention as disclosedin the ap ended claims.

claim: I v 1. A dipper bucket comprising front and back castings having overlapping portions secured togetherat the sides near the topand bottom of the bucket, a cutaway central portion, and a metalplate covering said cutaway central portion and riveted to said front and rear castings.

2. A dipper bucket comprising front and back castings having overlapping portions secured together at the sides near the top and bottom of-the bucket, a cutaway central portion, a. metal plate covering said cutaway central portion and rivetedto said front and rear castings, and a bracket at each side riveted to said front casting and to the side plate.

3. A dipper bucket comprising front and back castings having overlapping portions secured together at the sides near the top and bottom of the bucket, a cutaway central portion, a metal plate covering said cutaway central portion and riveted to said front and cutaway central portion and riveted to said rear castings, and a supporting bracket at front and rear castings, the back casting 10 each side secured to said frontcasting. having a curved corner and provided with 4. A dipper bucket comprising front and an interior depression, said plate being back castmgs having overlapping portions curved and riveted into said depression.

secured together at the sides near the top In testimony whereof I have hereunto set and bottom of the bucket, a cutaway central my hand this 15th day of August, 1925. portion, and a metal plate covering said ERNEST E. CRANE. 

